Lueneburgite (Mg-P borate) was discovered in 1968 by the author, in spite of its rarity as from a mirabilite deposit in Shansi, China. Different methods of identifications have been performed on the mineral for its mineralogical aspects with such as microscopic and SEM determinations, and spectral, microscopic laser spectral, chemical, differential thermal and infrared spectral analyses. It is demonstrated that the Mg-P borate, formula Mg3B2O (OH)4 (PO4)2. 6H20, occurs as spherical aggregate and exhibits a diversity in morphology, with cell parameters a=9，710A，b= 7, 553A and c=9,922A，and β=97°06'. The strongest lines in the powder diffraction pattern are 5, 00 (10)，2,97(10)，4，87 (9)，2,83(9)，3,25(8)， 3,03(8) and1,943(7)，and the main infrared absorption bands, 3399，3232,1663， 1122, 1074 and 1019 cm-1.